The optical properties of Ag2Te crystals from THz to UV
The optical properties of monoclinic Ag2Te crystals are studied in a wide range (3.7 meV–6.2 eV) of photon energies. The measured reflectivity spectra from THz to UV allow unambiguous a photon energy-dependent complex dielectric function, complex refractive index and absorption coefficient to be obt...
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| Veröffentlicht in: | Journal of alloys and compounds 2017-11, Vol.725, p.433-440 |
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| container_title | Journal of alloys and compounds |
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| creator | Yeh, Tien-Tien Lin, Wen Hao Tzeng, Wen-Yen Le, Phuoc Huu Luo, Chih-Wei Milenov, Teodor I. |
| description | The optical properties of monoclinic Ag2Te crystals are studied in a wide range (3.7 meV–6.2 eV) of photon energies. The measured reflectivity spectra from THz to UV allow unambiguous a photon energy-dependent complex dielectric function, complex refractive index and absorption coefficient to be obtained. The spectral structure in these optical parameters further indicates the coexistence of an indirect transition with a bandgap energy of about 10 meV and a direct transition with a bandgap energy of about 1.84 eV.
•The reflectivity spectra of β-Ag2Te crystals were measured from 3.7 meV to 6.2 eV.•The complex refractive index spectra show n > k at photon energy >33 meV.•An indirect bandgap (∼10 meV) and a direct bandgap (∼1.84 eV) coexist in β-Ag2Te. |
| doi_str_mv | 10.1016/j.jallcom.2017.07.153 |
| format | Article |
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•The reflectivity spectra of β-Ag2Te crystals were measured from 3.7 meV to 6.2 eV.•The complex refractive index spectra show n > k at photon energy >33 meV.•An indirect bandgap (∼10 meV) and a direct bandgap (∼1.84 eV) coexist in β-Ag2Te.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2017.07.153</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Absorptivity ; Ag2Te ; Band gap ; Crystals ; Energy measurement ; Optical properties ; Refractivity ; Semiconductors ; Silver compounds ; Spectroscopy ; Tellurides</subject><ispartof>Journal of alloys and compounds, 2017-11, Vol.725, p.433-440</ispartof><rights>2017 Elsevier B.V.</rights><rights>Copyright Elsevier BV Nov 25, 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c403t-82c4349d279decc6a52c47c49eff002822364c213038cb9f3d1d7ccf7f2419f33</citedby><cites>FETCH-LOGICAL-c403t-82c4349d279decc6a52c47c49eff002822364c213038cb9f3d1d7ccf7f2419f33</cites><orcidid>0000-0002-6453-7435 ; 0000-0003-4104-7107</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S092583881732529X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Yeh, Tien-Tien</creatorcontrib><creatorcontrib>Lin, Wen Hao</creatorcontrib><creatorcontrib>Tzeng, Wen-Yen</creatorcontrib><creatorcontrib>Le, Phuoc Huu</creatorcontrib><creatorcontrib>Luo, Chih-Wei</creatorcontrib><creatorcontrib>Milenov, Teodor I.</creatorcontrib><title>The optical properties of Ag2Te crystals from THz to UV</title><title>Journal of alloys and compounds</title><description>The optical properties of monoclinic Ag2Te crystals are studied in a wide range (3.7 meV–6.2 eV) of photon energies. The measured reflectivity spectra from THz to UV allow unambiguous a photon energy-dependent complex dielectric function, complex refractive index and absorption coefficient to be obtained. The spectral structure in these optical parameters further indicates the coexistence of an indirect transition with a bandgap energy of about 10 meV and a direct transition with a bandgap energy of about 1.84 eV.
•The reflectivity spectra of β-Ag2Te crystals were measured from 3.7 meV to 6.2 eV.•The complex refractive index spectra show n > k at photon energy >33 meV.•An indirect bandgap (∼10 meV) and a direct bandgap (∼1.84 eV) coexist in β-Ag2Te.</description><subject>Absorptivity</subject><subject>Ag2Te</subject><subject>Band gap</subject><subject>Crystals</subject><subject>Energy measurement</subject><subject>Optical properties</subject><subject>Refractivity</subject><subject>Semiconductors</subject><subject>Silver compounds</subject><subject>Spectroscopy</subject><subject>Tellurides</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqFkE9LAzEQxYMoWKsfQQh43jX_NtmcpBS1QsHL1mtYZxPdZdusSSrUT29KvXsaZnjvzcwPoVtKSkqovB_KoR1H8NuSEapKokpa8TM0o7XihZBSn6MZ0awqal7Xl-gqxoEQQjWnM6SaT4v9lHpoRzwFP9mQehuxd3jxwRqLIRxiaseIXfBb3Kx-cPJ483aNLlye2pu_Okebp8dmuSrWr88vy8W6AEF4KmoGggvdMaU7CyDbKg8UCG2dI4TVjHEpgFFOeA3v2vGOdgrAKccEzS2fo7tTbr7ta29jMoPfh11eaaiWiktaKZVV1UkFwccYrDNT6LdtOBhKzJGRGcwfI3NkZIgymVH2PZx8Nr_w3dtgIvR2B7brg4VkOt__k_ALCf9wbA</recordid><startdate>20171125</startdate><enddate>20171125</enddate><creator>Yeh, Tien-Tien</creator><creator>Lin, Wen Hao</creator><creator>Tzeng, Wen-Yen</creator><creator>Le, Phuoc Huu</creator><creator>Luo, Chih-Wei</creator><creator>Milenov, Teodor I.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0002-6453-7435</orcidid><orcidid>https://orcid.org/0000-0003-4104-7107</orcidid></search><sort><creationdate>20171125</creationdate><title>The optical properties of Ag2Te crystals from THz to UV</title><author>Yeh, Tien-Tien ; Lin, Wen Hao ; Tzeng, Wen-Yen ; Le, Phuoc Huu ; Luo, Chih-Wei ; Milenov, Teodor I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c403t-82c4349d279decc6a52c47c49eff002822364c213038cb9f3d1d7ccf7f2419f33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Absorptivity</topic><topic>Ag2Te</topic><topic>Band gap</topic><topic>Crystals</topic><topic>Energy measurement</topic><topic>Optical properties</topic><topic>Refractivity</topic><topic>Semiconductors</topic><topic>Silver compounds</topic><topic>Spectroscopy</topic><topic>Tellurides</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yeh, Tien-Tien</creatorcontrib><creatorcontrib>Lin, Wen Hao</creatorcontrib><creatorcontrib>Tzeng, Wen-Yen</creatorcontrib><creatorcontrib>Le, Phuoc Huu</creatorcontrib><creatorcontrib>Luo, Chih-Wei</creatorcontrib><creatorcontrib>Milenov, Teodor I.</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yeh, Tien-Tien</au><au>Lin, Wen Hao</au><au>Tzeng, Wen-Yen</au><au>Le, Phuoc Huu</au><au>Luo, Chih-Wei</au><au>Milenov, Teodor I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The optical properties of Ag2Te crystals from THz to UV</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2017-11-25</date><risdate>2017</risdate><volume>725</volume><spage>433</spage><epage>440</epage><pages>433-440</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>The optical properties of monoclinic Ag2Te crystals are studied in a wide range (3.7 meV–6.2 eV) of photon energies. The measured reflectivity spectra from THz to UV allow unambiguous a photon energy-dependent complex dielectric function, complex refractive index and absorption coefficient to be obtained. The spectral structure in these optical parameters further indicates the coexistence of an indirect transition with a bandgap energy of about 10 meV and a direct transition with a bandgap energy of about 1.84 eV.
•The reflectivity spectra of β-Ag2Te crystals were measured from 3.7 meV to 6.2 eV.•The complex refractive index spectra show n > k at photon energy >33 meV.•An indirect bandgap (∼10 meV) and a direct bandgap (∼1.84 eV) coexist in β-Ag2Te.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2017.07.153</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-6453-7435</orcidid><orcidid>https://orcid.org/0000-0003-4104-7107</orcidid></addata></record> |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Absorptivity Ag2Te Band gap Crystals Energy measurement Optical properties Refractivity Semiconductors Silver compounds Spectroscopy Tellurides |
| title | The optical properties of Ag2Te crystals from THz to UV |
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